Hybridserver Tec GmbH

Any device whose MAC address begins with A4:9B:F5 has a network interface built by Hybridserver Tec GmbH. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

A4:9B:F5

Organization

Hybridserver Tec GmbH

Address

Gutenbergring 26a Norderstedt Schleswig-Holstein DE 22848

Source

IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.